Question

why is rotational motion important............its urgent....​

Answer 1

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Rotational inertia is important in almost all physics problems that involve mass in rotational motion. It is used to calculate angular momentum and allows us to explain (via conservation of angular momentum) how rotational motion changes when the distribution of mass changes.

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Answer 2

ello user

rotation reduces the frictional force to a very large extent and hence it is required to study rotational motion in a certain way so as to know the effect and causes of it and to make some applications of it over certain things so as to reduce the force and make its motion smooth and at a low force.

Hope this helps